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gate

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gate

 [gāt]
1. an electronic circuit that passes a pulse only when a signal (the gate pulse) is present at a second input.
2. a mechanism for opening or closing a protein channel in a cell membrane, regulated by a signal such as increased concentration of a neurotransmitter, change in electrical potential, or physical binding of a ligand molecule to the protein to cause a conformational change in the protein molecule.
3. to open and close selectively and function as a gate.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

gate

(gāt),
1. To close an ion channel by electrical (for example, membrane potential) or chemical (for example, neurotransmitter) action.
See also: cardiac gating.
2. Action of a special nerve fiber to block the transmission of impulses through a synapse, for example, gating of pain impulses at synapses in the dorsal horns.
See also: cardiac gating.
3. A device that can be switched electronically to control the passage of a signal.
See also: cardiac gating.
4. To use a physiologic signal, such as an ECG, to trigger an event such as an x-ray exposure or to partition continuously collected data.
See also: cardiac gating.
[O.E. geat]
Farlex Partner Medical Dictionary © Farlex 2012
Cell biology A structure composed of one or more proteins that regulate passage of ions through channels in the cell membrane; gates may be chemically regulated—by neurotransmitters—or voltage regulated—in response to a threshold level of depolarization
Drug slang A regional term for Spanish heroin
Informatics An electronic circuit that performs an operation when the criteria for a logical relation—e.g., AND, or OR—are fulfilled
Immunology verb To limit the size of cells detected and their fluorescence in flow cytometry to increase the purity of cell population being analysed or sorted
Vox populi A new root form derived from the Watergate scandal which toppled the Nixon administration; -gate has been applied to various scandals. Medically-related -gates include AIDSgate and Bloodgate
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
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References in periodicals archive
Prosecutor Andrew McInnes said the complainant was at a friend's home for a New Year''s Eve party when the defendant and another man gate-crashed it.
Michaele and her husband Tareq Salahi prompted a review of security procedures when they gate-crashed a dinner held for Indian Prime Minister Manmohan Singh in November.
Talks between the two sides aimed at avoiding three five-day strikes over pay and conditions broke down on Saturday evening after protesters gate-crashed the talks.
Harrison's new work, like certain awkward and entertaining people, gate-crashes the genre of sculpture but ends up being the life of the party anyway.
Her friends are video-chatting online when a user named billie227 gate-crashes the conversation.
Washington D.C., June 13 (ANI): Michaele and Tareq Salahi, the American couple, who gate-crashed President Barack Obama's first State Dinner hosted for Indian Prime Minister Dr Manmohan Singh in November 2009, organized a 'saree' competition during an Indo-U.S.
A TEENAGER'S parents were left with a pounds 5,000 repair bill when 100 revellers gate-crashed her party after details of the bash appeared on the social networking site Facebook.
KIMI Raikkonen spectacularly gate-crashed Lewis Hamilton's hoped-for British Grand Prix party by claiming his first Silverstone victory.
I've still got the pounds 1 note which Ali autographed for my dad but my enduring memory was that of a young inner city lad who gate-crashed the event to meet this hero and was welcomed to join the top table for a meal.
DAVID Platt's Nottingham Forest gate-crashed the Division One play-off zone with a thrilling victory at Sheffield United.
In the ballroom scene Cooper, dressed in black leather pants, shirt, and frock coat, gate-crashes the ball by walking perilously along the balustrade on the balcony.
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